One possible origin of this traditional promise is Japan, where it is known as ‘yubikiri’, meaning “finger cut-off”. Supposedly, people in Japan believed that if you break a pinky promise, you have to cut off your pinky finger in return.Thankfully over the period of time, this strange tradition has transitioned more into a word of promise.

One possible origin of this traditional promise is Japan, where it is known as ‘yubikiri’, meaning “finger cut-off”. Supposedly, people in Japan believed that if you break a pinky promise, you have to cut off your pinky finger in return.Thankfully over the period of time, this strange tradition has transitioned more into a word of promise.